US4180494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermoplastic polyesters
Assignee: Rohm and Haas Co
•
Filing: 1978-09-20
•
Granted: 1979-12-25
•
Expires: 1998-09-20
Abstract
Abstract High impact and solvent resistant composition comprising (A) about 25 to 95 percent by weight of an aromatic polyester, (B) about 1 to 8 percent by weight of an aromatic polycarbonate, and (C) and balance to make 100% of a coreshell polymer having a butadiene-based core. Preferably the composition also includes about 1 to 150 parts by weight of glass fiber reinforcement per 100 parts of (A), (B), and (C).
Inventors
- 👤 Harry C. Fromuth
- 👤 Kenneth M. Shell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:29
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
48 words
A composition having high impact and solvent resistance comprising A. about 25 to 95 percent by weight of an aromatic polyester; B. about 1 to 8 percent by weight of an aromatic polycarbonate; C. the balance to make 100% of a core-shell polymer polymerized from monomers comprising butadiene.
Claim 2
Dependent Claim
48 words
A composition having high impact and solvent resistance comprising A. about 25 to 95 percent by weight of an aromatic polyester; B. about 1 to 8 percent by weight of an aromatic polycarbonate; C. the balance to make 100% of a core-shell polymer polymerized from monomers comprising butadiene.
Claim 3
Dependent Claim
12 words
The composition of claim 1 wherein the aromatic polyester is polyethylene terephthalate.
Claim 4
Dependent Claim
20 words
The composition of claim 2 wherein the polyethylene terephthalate has an estimated intrinsic viscosity range of about 0.3 to 2.5.
Claim 5
Dependent Claim
18 words
The composition of claim 1 wherein the core-shell polymer has a core polymerized from over 50 percent butadiene.
Claim 6
Dependent Claim
16 words
The composition of claim 1 further including filler comprising particulate filler, fibrous reinforcement, or combinations thereof.
Claim 7
Dependent Claim
28 words
The composition of claim 1 further including about 1 to 150 parts by weight glass fiber reinforcement, based on 100 parts by weight of (A), (B), and (C).
Claim 8
Dependent Claim
36 words
The composition of claim 1 wherein the aromatic polyester (A) is polyethylene terephthalate, having an intrinsic viscosity of about 0.5 to 1.2 and the aromatic polycarbonate (B) is the reaction product of phosgene and bisphenol A.
Claim 9
Dependent Claim
44 words
The composition of claim 7 wherein the core-shell polymer (C) has a core polymerized from a monomer system comprising butadiene, styrene, methyl methacrylate, and divinyl benzene, a second stage polymerized from styrene, and a final stage polymerized from methyl methacrylate and 1,3-butylene glycol dimethacrylate.
Claim 10
Dependent Claim
16 words
The composition of claim 8 further including about 20 to 100 parts of glass fiber reinforcement.
Claim 11
Dependent Claim
11 words
An injection molded article molded from the composition of claim 1.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-24 | 1983-06-25 | 1983-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-24 | 1987-06-25 | 1987-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-24 | 1991-06-25 | 1991-12-25 | $7700.00 | Window Closed / Lapsed |